Sensio diffuser 90 degree joints

Recently fitted some under-cabinet LED strip lighting in surface-mounted diffusers but there were no included corner joints (expected) or any readily available to downloadThese joints allow me to join the diffuser profiles so I won't get any odd light leakage but also to tidy up any rough edges where diffuser channels have needed to be cut.These were used on a specific diffuser but may fit others if they have the same dimensions.The ones I've used are from Toolstation (in the UK), item 70402 (1m) or 87128 (2m) and they measure 18mmx8.5mmThese have quite tight tolerance so they grip the channels quite snug ensuring they won't need glueing and won't just fall offVery quick to print, more than solid enough using BL Basic PLAMy specific use case was for LED light strip channels that weren't completely flush….for those that need to be flush mounted I have also uploaded two other versions these will need a small drop of glue or double-sided tape to keep them in place